Device for making a winding staff



April 16, 1968 J. SIMQN 3,377,ss9

April 16, 1968 2 Sheets-Sheet Filed Oct. 28, 1965 Flags FIGA' United States Patent O 3,377,S89 DEVICE FOR MAKING A WINDING STAFF John Simon, 35 Rue du Nord, Tramelan, Switzerland Filed Oct. 28, 1965, Ser. No. 505,524 Claims priority, application Switzerland, Dec. 3, 1964, 15,624/ 64 1 Claim. (Cl. 77-62) ABSTRACT OF THE DISCLOSURE A winding staff of the articulated type formed of a cylindrical part having a threaded extremity adapted to engage the winding crown and the other extremity of which has two radial openings and an axial slot extending on the entire diameter of the part and making the openings communicate-One of the openings serves to make resilient two jaws at the extremity of the part. In the jaws is movably mounted an inner part having a large extremity movable in one of the openings between a first position in which it bears against the inner extremity of the second opening when the crown is screwed and a setting position in which it bears against the outer extremity of the second opening when the crown is unscrewed. Also disclosed is a device for making an ar- The invention is concerned with a device for drillng an articulated watch staff, characterized by a support on the central part of which is mounted a holder hearing on the one hand a pivot on which is rotatably mounted a driiling-jig and on the other part, by means for locatng this drilling-jig, and by the fact that means for positioning the external section of a watch staff are provided on the work holder via the support, while stop means for the drilling-jig are mounted thereon on the other side of the support, the whole being arranged in such a way that when the section of the watch staff to be drilled is placed on the work holder, it sutficcs to pivot and to block the drilling-jig above the support to accurately position the jig above the section of the watch staff, the stop means coming into contact with the free extremity of the staff holder.

The annexed drawing represents, by way of example, one embodiment of the above indicated device and one type of such an articulated staff.

FIGURES 1 and 2 show a winding stem of the articulated type, that is, formed of two joined sections, the exterior one a intended to bear the crown and the other, internal, b mounted in the movement and controlling the winding mechanism and the setting mechanism.

FIGURE 1 is a side elevational view of this stem and FIGURE 2 is a plan view thereof.

FIGURE 3 is a cross-sectional view of the abovementioned device and FIGURE 4 is a section along IV-IV of FIGUR-E 3.

In the watch cases of watches with screwed crown, three positions of the crown are possible. One the screwed position of the crown which ensures water resistance for the watch near the winding mechanism, the unscrewed position of the crown where the same may be actuated for winding and finally the position where the crown is pulled out to permit setting.

ICC

The staff shown in FIGURE 1 is a cylindrical part 1, having one end 2 threaded in order to fit in the winding crown, not shown, and the other extremity of which 3 is pierced by two radial openings 4 and 5 and an axial slot 6 extending along the entire diameter of the part and causing openings 4 and 5 to communicate. Opening 4 has for its function to ensure a certain elasticty two jaws 7 and 8 at the end of the part.

In opening 5 sits the enlarged extremity of staff 9 of section b which controls the winding mechanism. This staff has a rectangular section in such a way as to be invariably rotated by part 1. Enlarged part 9 of staff 10 can move in its opening 5 Ibetween two positions. The length of opening 5 is equal to the length of part a plus the length of the path of movement of part a relative to part b during screwing or unscrewing of the crown on the case.

Owing to this possible displacement of the enlarged extremity 9 in opening 5, the latter comes against the internal extremity of the former when the crown is screwed. On the contrary, when the crown in unscrewed, the extremity 9 comes into contact with the external part of opening 5 in such a way that upon axially pulling on the crown of the winding mechanism, setting becomes instantly possible. It is understood that the dimensions of the openings of the staff holders must be observed with great precision, Which is permitted by the present process and device.

One of the important advantages of this staff is that it can be inserted in a watch case a single shell watch case from the outside. In effect, the elasticity of jaws 7 and 8 allows the enlarged section 9 of staff 10, the faces of which are cone-shaped, to enter these jaws in order to link mechanically the two sections a and b, after insertion of the movement in the single shell watch case.

In the process of making this staff, two parallel openings are radially pierced in a cylindrical part and next an axial slot is made along the entire diameter of the part beginning with its non-threaded extremity until the two said openings areV joined. A suitable device permits to obtain the required precision.

Referring to FIGURES 3 and 4, it is seen that the device comprises a support 11 on the central part of which is mounted a piece-holder 12 having on its upper part a transversal groove 13 in which are placed laterally the outer sections of the staff holders to be machined. A screw 14 screwed through a hearing 26 fast on support 11 is placed an extension of groove 13 and has at its extremity a stop 14a adapted to penetrate in this groove to assure the axial Positioning of piece a.

On either side of the piece-holder 12 are mounted on support 11 a pivot 15 and a stop 25 in which is screwed a threaded shaft 21 fast on blocking means 16 provided with control level 19. A drilling-jig holder 17 is rotatably mounted on pivot 15 and hel-d axially yby screw 18. The holder 17 has an opening 20 partially surrounding stop 25. Lever 19 rigid with blocking means 16 makes possible the positioning of holder 17 in the position defined by pillar or stop and opening 20, as shown in FIGURES 3 and 4.

On the drilling-jig holder 17 is mounted a drilling-jig 22 in which are perforated two openings of which one 23 can be seen on FIGURE 3. These holes are perpendicular to the groove 13 and guide the piercing tools or burrs for machining openings 4 and 5 of the outer section a of the staff. A control member 24 is movably mounted in the plane of the drilling-jig holder by thread 27. This member 24 terminates in stop 2411 the diameter of which corresponds to the width of groove 13. Control member 24 permits to place stop 24a in groove -13 in order to grip part a between the extremity of stops 14a and 24a 3 v which constitute the positioning stops for part a relative to guiding holes 23. The thread 27 of member 24 is intended to withdraw stop 2 4a from groove 13 in order to permit the rotation of the drilling-jig holder 17.

The present device functions in the following manner:

The drilling-jig holder 17 is turned in order to bring it to the position shown in dotted lines in FIGURE 4 in order to free groove 13, there is introduced a part a in this groove and the drilling-jig holder is turned until its opening 20 touches member 25. The control member 24 is moved axially in order to cause part a to bear against stop 14a, then the drilling-jig holder 17 is fixed by means of the blocking lever 19 Which gripping part a between the groove 13 and the lower surface of drilling-jig 22, after Which openings 4 and 5 may be drilled.

It is under stood that this device, which is indicated as lbeing manually operated, can function automatically. In any event, it permits an accurate machining, rapid and economic of staif-holders.

What is claimed is:

-1. A device for making an articulated windingr staff comprising, a support for such staff, means on said support for laterally positioning such stafi thereon, a drilling jig holder rotatably mounted on a pivot on said support which pivot Visec'centric in relation to said support and perpendicular to the plane of the upper face of said support, said holder being movable between a position in which said jig covers at Vleast partially said support above said lateral Positioning means and a position in which said support is uncovered, a drilling jig carriedv by. said holder and having two openings therein, stop means on said drilling jigholder, said stop means being axially movable relative to such Staff located on said support, other stop means mounted on said support for axially positioning such staff on said support, and a tightening member for securing said drilling jig holder and such staff in a working position on said support.

I References Cited UNITED STATES PATENTS 2/1958 Lentino et al. 77-62 FRANCIS S. HUSAR, Primary Examner. 

